Single-stock leveraged exchange-traded funds (ETFs) have been identified as the primary driver of increased volatility in Korean stocks, according to Shinhan Investment & Securities research. The analysis found that when annualizing 2026 asset volatility, the KOSPI registered 57%, while SK Hynix and Samsung Electronics recorded 90% and 78% respectively—their corresponding single-stock leveraged products reached double that at 180% and 156%. Researcher Park Woo-yeol from Shinhan Investment & Securities stated that volatility exceeding 80% represents ultra-high volatility previously observable only in thematic stocks such as quantum or alternative meat sectors. Sixteen single-stock leveraged ETFs were simultaneously listed on May 27, trading an average of approximately 10 trillion won daily in their first month and amplifying index volatility. The Korean stock market's structural concentration in Samsung Electronics and SK Hynix, which account for 65% of the KOSPI200, magnifies the impact of single-stock volatility on overall index movements compared to more diversified markets.
VKOSPI Surpasses 2008 Financial Crisis Peak Following May 27 ETF Listings
The KOSPI200 Volatility Index (VKOSPI) had already entered a persistent high-volatility phase with an average of 53 before the single-stock leveraged ETF listings, according to Park. From May 27 to the present, VKOSPI surpassed 81. The 2008 financial crisis saw a VKOSPI peak of 89.3, but on last month 9th, the index broke through 91.2, setting a new volatility record. The current daily average stands at 88.9, maintaining a persistent high-volatility phase.
Samsung and SK Hynix Account for 65% of KOSPI200 Index Weight
The influence of single-stock leveraged products on the Korean index is greater than in overseas markets due to the high index weighting of Samsung Electronics and SK Hynix in the KOSPI. Park noted that while the United States has a developed single-stock leveraged ETF market with hundreds of leveraged products trading, NVIDIA—the largest by market capitalization—had an index weight of only 2-3% when its leveraged ETF launched and currently stands at around 8%. In contrast, Samsung Electronics and SK Hynix account for approximately 65% of the KOSPI200 and approach half of the MSCI KOREA ETF weighting. The impact of single-stock volatility expansion on the index is correspondingly greater.
Market Maker Delta Hedging Amplifies Directional Price Movements
The expansion of leveraged ETFs creates market concentration through the market maker (MM) delta dispersion process. When selling swap contracts for market making in a rising stock price environment, purchasing stock spot positions to establish a neutral position fuels buying that reinforces the upward movement—the reverse applies in declining markets. Park explained that when put option open interest accumulates consecutively at specific strike price resistance levels, touching the first strike price generates downward pressure that consecutively touches the next resistance level—a phenomenon called a gamma squeeze, which has higher probability of occurrence when gamma exposure (GEX) is negative. The delta value required to maintain a neutral position changes according to the underlying asset price, and concentration occurs while dynamically adjusting this value.
FAQ
What caused Korean stock market volatility to exceed 2008 financial crisis levels?
Sixteen single-stock leveraged ETFs were simultaneously listed on May 27, trading an average of approximately 10 trillion won daily in their first month. The VKOSPI broke through 91.2 on last month 9th, surpassing the 2008 financial crisis peak of 89.3, with current daily average at 88.9.
How does the Korean stock market structure differ from the US regarding leveraged ETF impact?
Samsung Electronics and SK Hynix account for approximately 65% of the KOSPI200 and approach half of the MSCI KOREA ETF weighting. In contrast, NVIDIA—the largest US stock by market capitalization—had only 2-3% index weight when its leveraged ETF launched and currently stands at around 8%, making single-stock volatility impact on Korean indexes correspondingly greater.
What mechanism causes leveraged ETFs to amplify stock price movements?
Market makers perform delta hedging to maintain neutral positions. In rising markets, selling swap contracts requires purchasing stock spot positions, creating buying pressure that reinforces upward movement. The reverse applies in declining markets. When gamma exposure is negative, this can trigger gamma squeezes where consecutive strike price resistance levels are breached.
